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Finding the Fourth Proportional to 21,063.78, 29,073.80 and 13,101.24

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Solution

The fourth proportional to 21,063.78, 29,073.80 and 13,101.24 is: 18,083.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,063.78 : 29,073.80 = 13,101.24 : x
  2. Step 2: Convert to fraction form
    21,063.78/29,073.80 = 13,101.24/x
  3. Step 3: Cross multiply
    21,063.78x = 29,073.80 × 13,101.24
  4. Step 4: Simplify right side
    21,063.78x = 380,902,831.51
  5. Step 5: Solve for x
    x = 380,902,831.51/21,063.78
  6. Step 6: Final answer
    x = 18,083.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.